Some 2024 Acadia, Traverse; and 2025 Enclave models may have an active grille shutter malfunction along with DTC P059F (Active Grille Air Shutter 1 Performance) set in the Engine Control […]
The monthly GM Service Know-How Emerging Issues seminars provide service/technical information on current issues and GM-certified repairs. This month the seminar highlights adjustments to the HUMMER EV Sky Panel. (Fig. […]
Backing out of the garage may bring some vehicles equipped with Reverse Automatic Braking to a quick stop. The design sensitivity of the rear virtual bumper on 2023-2024 LYRIQ; 2024 […]
Some 2024 Traverse models may show low spots or dimples on the front and center portions of the hood. The low spots will only be noticeable when the hood is […]
The low-beam headlamp may be inoperative on some 2019-2024 Silverado 4500HD/5500HD/6500HD models. (Fig. 6) Fig. 6 If the low-beam headlamp is not working properly, check the electrical connector […]
The Adaptive Cruise Control or regular Cruise Control as well as the Lane Keep Assist system may turn on/off while driving or may be inoperative on some 2019-2023 Encore GX […]
Some 2019-2022 Silverado 1500, Sierra 1500; and 2020-2022 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD models may have an illuminated Check Engine MIL at startup along with DTC U0100 (Lost Communication with […]
The latest diagnostic assistance from the professionals at the GM Technical Assistance Center is now available in the July GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]
There are several Service Programming System (SPS) errors that can be resolved by following some basic steps, and do not require replacing the control module, on 2000-2025 GM models. No […]
The Tremec DCT TR9080 dual clutch transmission (RPO M1L, M1M) on 2020-2024 Corvettes features an external canister filter that should be replaced at the initial 7,500-mile (12,000-km) maintenance service. After […]
The GM Field Service Engineer (FSE) Technician Recognition Awards (U.S.) celebrate the skill and dedication of dealership technicians who have recently worked with FSEs on challenging repairs. Technicians at GM […]
There may be a noise from the bell housing area of the DCT TR9080 transmission (RPO M1L, M1M) on some 2020-2024 Corvettes along with a number of DTCs set in […]
The monthly GM Service Know-How Emerging Issues seminars provide service/technical information on current issues and GM-certified repairs. This month the seminar covers a tear down and inspection of the VT40 […]
The GM Tools and Equipment program recently introduced their latest tool organization program – the new GM Virtual Tool Crib (VTC). The Virtual Tool Crib application is designed to help […]
Update – Midtronics DCA-8000 Diagnostic Charger is the Only Accepted Battery Tester for Warranty Battery Replacement (U.S.)
Rear Leaf Spring Noise and Possible Fuel Contamination
2027 Bolt State of Charge and NACS Charging Tips
Fuse F17UA and Possible No Start Condition
Inoperative PTO on Silverado Medium-Duty Trucks
Create Custom Data Lists in GDS 2
Updated Transfer Case Input Shaft Seal Installation
A/C Leak Detection Dye for EVs
When and Why to Use Fuel Additives
GM Service Know-How Emerging Issues
Check 55-Way Connector if Glow Plug DTCs are Set
Setting Up Wired and Wireless MDI 2 Connections
MDI 2 Advanced Setup Technical Tips Update
April Service Newsletter from the Experts at GM TACDCA-8000
Troubleshooting
Guide
TAC Newsletter April 2026
TAC Newsletter March 2026
MDI-2 Connections and Advanced Setup 2026
CX Connect Case Creation Help + Tips and Tricks
The new 1.2L engine (RPO LBP), introduced in the 2025 Envista, Encore GX, Trax and Trailblazer, features E85 compatibility. As part of the updates to the Evaporative Emission (EVAP) system, […]
With the MDI Manager application software, the MDI 2 can be configured to communicate with a PC using several possible networks, such as a USB cable, ethernet cable, Wireless Local […]
Take a detailed look at a wide range of innovative features and advanced systems found on GM vehicles to gain a better understanding of proper operation. Each short video reviews how a feature works, highlights operating tips and shows ways to customize settings, if applicable.
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